67816361domain: NPropertiesPrimalityPrimeyesAppears in sequencesInitial members of prime septuplets (p, p+2, p+6, p+8, p+12, p+18, p+20).at n=10A022009Primes p in prime septuplets (p, p+2, p+6, p+8, p+12, p+18, p+20) at the end of the maximal gaps in A201051.at n=4A233425Initial members of prime septuplets.at n=24A257124Prime numbersat n=3997136